Most engine tuners now recommend temps in the upwards of 200+F

Well, it looks like I fixed the air leak in my engine. Then I had to get the engine back tuned in from when it was leaking. Got the engine just right in the practice before the A-main. Running strong and FAST at 224 degrees, then.......

....baaaaaaaaaaa....<doing my best engine noise sound>......POP! Engine stopped instantly. Took the manifold off to get a peak at the inside and the flywheel and shaft is moving but the piston isn't...Ouch!

Haven't disassembled it yet, but my guess is a broken rod.

So... where was the leak?

Don't know for sure. I sealed up the fuel inlet and carb/engine block at the same time, so it was one of those two locations. I found that it wasn't the tank leaking because I tested the car before I change the tank and the problem was gone.

Well I was wrong. It wasn't the con-rod that broke in the engine. It was the shaft! Take a look at the pic. This was defintely a first for me.

Don't worry, one of these days they'll get the quality issues figured out; right AFM?

I wasn't trying to start anything like that. People have different views on what a companies quality control is. And its based on thier experience with the company.

His experience has obviously been great, while I and a couple people I know have had some problems. No biggie, just the way things happen sometimes.

HOLY CRAP! Doesnt look like i will run my sirio anymore

Appreciate your honest point of view Darkseid, not the sarcasm that OB42TC3 is implying in his response, which by the way doesn't affect me, because I've had nothing but good experiences and track results with my Sirios.
I've had a broken crank with an RB engine in the past, and other friends had them on other Nova based engines, and that doesn't mean Novarossi has bad quality. In most cases we've concluded in it beeing because of a bad tuned engine(overheated) or bad quality fuel.
By seeing your crank (color), and by the description of your leaking problems, before you fixed them, I most certainly can tell you that the breakage came because the crank was allready stressed from running overheated with a lean mixture, produced by the leaks of the past.
As you say....just the way things happen sometimes.....
Hope you have better luck with your next engine, whatever make it is.

AFM

just got a evo 5 port for my mtx3, if it works as well as in my 3 port legal losi truck should be a blast, let's see how they lastl next purchase, mega with 1,9 hp salven.

Darkside: Here's a pic of a blown Nova Rossi Engine. I have been in the Hobby for about 12 years and Sirios hasn't been the only engine with "quality" problems. This guy was running at 250 degrees, a perfectly "race" temperature.

ANother photo of a Mugen MT-12 engine which popped in the middle of a race (A-Main). As you can see my friend, NO engine manufacturer ins flawless, I have learned that with time and experience.

"I've had a broken crank with an RB engine in the past, and other friends had them on other Nova based engines, and that doesn't mean Novarossi has bad quality. In most cases we've concluded in it beeing because of a bad tuned engine(overheated) or bad quality fuel." end of quote


I agree 100% with you AFM. We have to remember also that there will always be many factor involving these kind of problems in an engine ranging from user's mistakes, productions flaws etc... I have venture again in using Sirio engines, after almost 8 years using, almost exclusively, Nova Rossi based engines (Top, REX, J.P's) I have found out that given the price of a Sirio you are getting in return a good "all around engine". It is a relieve for me not to expend 250.00 plus on engines every year.

I personally race a Collari/Sirio engine on my Sedan. Now I am planning on buying an EVO Sirio for my club races.

That was my guess too. Thats why it didn't really stress me out to much. Theres a reason these companies don't offer a warranty on these high performance engines. Cause s*** happens sometimes.

I haven't found the occasion when I needed to go $250+ fast!

$160-$180 is more than fast enough for me!